It's an estimation -  I speak to an average of 15-20 candidates a week over the last 10 years minus some holidays. In agency I close about 50 roles a year, internal I do 70 a year so about there. I move 50% of the candidates I spoke with into the funnel so about 3500, of which 600 got hired. Only 17% made it through the funnel, not the best stats for a recruiter honestly lol tho I have much better success rate internally. A lot of wild goose chases during my agency days.